Securities - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale
Due in one year or less, Amortized Cost	$ 18,297
Due after one through five years, Amortized Cost	46,446
Due after five through ten years, Amortized Cost	18,931
Due after ten years, Amortized Cost	67,874
Amortized Cost, Available-for-sale	151,548	$ 164,705
Due in one year or less, Fair Value	17,833
Due after one through five years, Fair Value	44,138
Due after five through ten years, Fair Value	17,157
Due after ten years, Fair Value	60,952
Total debt securities available-for-sale, Fair Value	140,080	150,069
Held-to-maturity
Due in one year or less, Amortized Cost	2,497
Due after one through five years, Amortized cost	5,164
Due after five through ten years, Amortized Cost	4,905
Due after ten years, Amortized Cost	213,713
Amortized Cost, Held-to-maturity	226,279	247,401
Due in one year or less, Fair Value	2,418
Due after one through five years, Fair Value	4,814
Due after five through ten years, Fair Value	4,359
Due after ten years, Fair Value	183,139
Total debt securities held-to-maturity, Fair Value	$ 194,730	$ 211,954